Structure de pions

	♔ Blancs	♚ Noirs
Pions doublés	—	—
Pions isolés	—	—
Arriérés	—	—
Chaînes	● f2→g3, h2→g3	● d6→e5, b7→c6
Passés	—	—
Majorité	—	—

Cases

	♔ Blancs	♚ Noirs
Cases fortes	● e4 (2v1), ● g5 (2v0)	—
Cases faibles	—	—
Centre	● e4 (2v1)	—

Colonnes et diagonales

♔ Blancs

♚ Noirs

Pièces

	♔ Blancs	♚ Noirs
Bc1	● Bc1 Non développé (mob. 5)
Bg2	● Bg2 Ok (mob. 2)
Be7		● Be7 Ok (mob. 0)
Bc8		● Bc8 Non développé (mob. 0)
Paire de fous	● Oui	● Oui
Non développées	2 (● c1, ● a1)	2 (● c8, ● a8)

Sécurité du roi

	♔ Blancs	♚ Noirs
Statut	● Roqué	● Roqué
Droits de roque	—	—

Thèmes

	♔ Blancs	♚ Noirs
Phase	Ouverture
Centre	tension
Ruptures	● c4-c5, ● d4-d5	● …c6-c5, ● …d6-d5

A54a — Old Indian: 5.g3 Be7, Main Line, 8.Qc2

1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3 Nbd7 5.g3 Be7 6.Bg2 O-O 7.O-O c6 8.Qc2 * ● Trait aux Noirs

Ouverture — Tension centrale

♔ Point de vue Blancs

8 7 6 5 4 3 2 1

abcdefgh

Plan principal. Jeu au centre (rupture c4-c5).

Atouts. Les Blancs s'appuient sur un contrôle dominant de e4 et g5.

En contrepartie. Plusieurs pièces dorment encore (le fou c1 et la tour a1).

Plans. Rd1 (42 % des parties) ; b3 (Préparer le fianchetto — 36 % des parties) ; h3 (Empêcher ...Bg4 — 11 % des parties) ; e4 (Occuper le centre — 6 % des parties).

♚ Point de vue Noirs

1 2 3 4 5 6 7 8

hgfedcba

Plan principal. Jeu au centre (rupture c6-c5).

En contrepartie. Plusieurs pièces dorment encore (le fou c8 et la tour a8) et le fou e7 reste passif.

Plans. ...Re8 (60 % des parties) ; ...Qc7 (27 % des parties) ; ...a6 (Préparer expansion aile dame — 7 % des parties).

Avantages

Faiblesses

Diagonale active

Plans

Partie
1933 Leningrad ch-URS – Round 1 – Yudovich, Mikhail M – 1/2-1/2 – Bohatyrchuk, Fedir Parfenovych – G25 1. d4 Nf6 2. Nf3 d6 3. c4 Nbd7 4. Nc3 e5 5. g3 Be7 6. Bg2 O-O 7. O-O c6 8. Qc2 Re8 9. e4 Bf8 10. h3 g6
1935 Warsaw olm – Round 12 – Opocensky, Karel – 1-0 – Spielmann, Rudolf – G42 1. c4 Nf6 2. Nc3 e5 3. g3 Be7 4. Nf3 d6 5. d4 Nbd7 6. Bg2 c6 7. O-O O-O 8. Qc2 Re8 9. b3 Bf8 10. Bb2 Qc7
1937 Bad Saarow – Round 5 – Engels, Ludwig – 1-0 – Weichert, P – G15 1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. Nf3 e5 5. g3 Be7 6. Bg2 O-O 7. O-O c6 8. Qc2 Qc7 9. b3 Re8 10. Bb2 Bf8
1939 Leningrad/Moscow – Round 6 – Bondarevsky, Igor – 1-0 – Panov, Vasily – G46 1. Nf3 Nf6 2. c4 d6 3. d4 Nbd7 4. Nc3 e5 5. g3 Be7 6. Bg2 O-O 7. O-O c6 8. Qc2 Re8 9. Rd1 Qc7 10. b4 Nf8
1942 Duras 60 Memorial – Round 8 – Opocensky, Karel – 0-1 – Alekhine, Alexander – G33 1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. Nf3 e5 5. g3 c6 6. Bg2 Be7 7. O-O O-O 8. Qc2 exd4 9. Nxd4 Nb6 10. b3 d5
1950 DDR Ch – Round 3 – Zirngibl, Albert – 1/2-1/2 – Grosser, Wilhelm – G5 1. d4 Nf6 2. c4 d6 3. Nf3 Nbd7 4. g3 e5 5. Bg2 Be7 6. O-O O-O 7. Nc3 c6 8. Qc2 Re8 9. Rd1 Qc7 10. h3 Nf8
1953 Bucharest – Round 17 – Stoltz, Gosta – 1/2-1/2 – Szabo, Ladislav – G161 1. d4 Nf6 2. c4 d6 3. g3 Nbd7 4. Bg2 e5 5. Nf3 Be7 6. Nc3 O-O 7. O-O c6 8. Qc2 Re8 9. Rd1 Bf8 10. b3 Qa5
1953 Venice Venice ITA – Round 1 – Udovcic, Mijo – 0-1 – Castaldi, Vincenzo – G2 1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3 Nbd7 5. g3 Be7 6. Bg2 O-O 7. O-O c6 8. Qc2 Re8 9. Rd1 Bf8 10. e4 a6
1954 Belgrade – Round 18 – Nedeljkovic, Srecko M – 1/2-1/2 – Pirc, Vasja – G142 1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. Nf3 e5 5. g3 Be7 6. Bg2 O-O 7. O-O c6 8. Qc2 Re8 9. b3 Qc7 10. Bb2 Nf8
1954 Montevideo – Round 11 – Horberg, Bengt-Eric – 1-0 – Bauza, Lorenzo – G85 1. d4 Nf6 2. c4 d6 3. Nf3 Nbd7 4. g3 e5 5. Bg2 Be7 6. Nc3 O-O 7. O-O c6 8. Qc2 exd4 9. Nxd4 Re8 10. Rd1 Bf8
1955 Buenos Aires – Round 1 – Martin Manzano, Antonio – 0-1 – Garcia Rodriguez, Raimundo – G2 1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3 Nbd7 5. g3 Be7 6. Bg2 O-O 7. O-O c6 8. Qc2 Re8 9. Rd1 Bf8 10. b4 e4
1955 Gothenburg Interzonal – Round 6 – Filip, Marius Liviu – 1/2-1/2 – Pilnik, Herman – G50 1. c4 e5 2. Nf3 d6 3. d4 Nd7 4. g3 Ngf6 5. Bg2 c6 6. O-O Be7 7. Nc3 O-O 8. Qc2 a5 9. b3 Re8 10. e3 Bf8
1957 Danmarksmesterskabet – Round 9 – Pedersen, Eigil – 1-0 – Kupferstich, Moises – G34 1. c4 Nf6 2. d4 d6 3. Nf3 Nbd7 4. g3 e5 5. Bg2 Be7 6. O-O O-O 7. Qc2 c6 8. Nc3 exd4 9. Nxd4 Nb6 10. b3 d5
1957 Przepiorka Memorial – Round 12 – Gromek, Jozef – 1-0 – Doda, Zbigniew – G75 1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. g3 e5 5. Bg2 c6 6. Nf3 Be7 7. O-O O-O 8. Qc2 a6 9. Rd1 Qc7 10. b4 Re8
1959 UKR Ch – Round 7 – Bannik, Anatolij – 1-0 – Pogrebissky, Iosif – G47 1. c4 Nf6 2. Nc3 e5 3. Nf3 d6 4. g3 Be7 5. d4 Nbd7 6. Bg2 O-O 7. O-O c6 8. Qc2 Re8 9. h3 Bf8 10. e4 exd4
1961 CAN Ch – Round 11 – Kalotay, Andrew – 1-0 – Vranesic, Zvonko – G29 1. Nf3 Nf6 2. g3 d6 3. Bg2 Nbd7 4. O-O e5 5. c4 c6 6. Nc3 Be7 7. d4 O-O 8. Qc2 Re8 9. e4 Qc7 10. Re1 Nf8
1961 Zevenaar – Round 1 – Milic, Bozidar – 1-0 – Henneberke, Frans – G23 1. Nf3 Nf6 2. g3 d6 3. d4 Nbd7 4. Bg2 e5 5. O-O Be7 6. c4 O-O 7. Nc3 c6 8. Qc2 Re8 9. e3 Qc7 10. b3 b6
1964 DEN Ch Holstebro – Round 9 – Kolvig, Bent – 0-1 – Pedersen, Eigil – G31 1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. g3 e5 5. Nf3 Be7 6. Bg2 O-O 7. O-O c6 8. Qc2 exd4 9. Nxd4 Nb6 10. b3 d5
1965 Pardubice – Round 1 – Pithart, Frantisek – 1/2-1/2 – Seifert, Aidan – G23 1. Nf3 Nf6 2. c4 d6 3. g3 e5 4. Nc3 Be7 5. d4 Nbd7 6. Bg2 c6 7. Qc2 O-O 8. O-O Re8 9. Rd1 Qc7 10. h3 Bf8
1966 WchTJ U26 fin-A – Round 4 – Kapengut, Albert – 1/2-1/2 – Stepak, Yedael – G17 1. d4 Nf6 2. c4 d6 3. Nf3 Nbd7 4. g3 e5 5. Bg2 Be7 6. O-O O-O 7. Qc2 c6 8. Nc3 Qc7 9. b3 Re8 10. Bb2 Rb8
1968 Budapest – Round 1 – Szilagyi, Gyorgy Laszlo – 0-1 – Kluger, Gyula – G81 1. Nf3 Nf6 2. g3 d6 3. Bg2 e5 4. O-O Be7 5. c4 O-O 6. d4 Nbd7 7. Nc3 c6 8. Qc2 Re8 9. Rd1 Bf8 10. e4 Qc7
1968 HUN-URS – Round ? – Portisch, Lajos – 1/2-1/2 – Sergievsky, Vladimir D – G16 1. Nf3 Nf6 2. g3 d6 3. d4 Nbd7 4. c4 e5 5. Nc3 Be7 6. Bg2 O-O 7. O-O c6 8. Qc2 Re8 9. b3 Qc7 10. Bb2 Nf8
1969 Raach zt – Round 6 – Portisch, Lajos – 1-0 – Espig, Lutz – G64 1. d4 d6 2. c4 e5 3. Nf3 Nd7 4. Nc3 Ngf6 5. g3 Be7 6. Bg2 O-O 7. O-O c6 8. Qc2 Re8 9. b3 Qc7 10. Bb2 b5
Candidats playoff-4pl 1985 – Round 4 – Timman, Jan H – 1/2-1/2 – Tal, Mikhail – G2 1. d4 Nf6 2. c4 c6 3. Nc3 d6 4. Nf3 Nbd7 5. g3 e5 6. Bg2 Be7 7. Qc2 O-O 8. O-O Re8 9. b3 Bf8 10. e4 a6
Candidats Tournament 1985 – Round 10 – Portisch, Lajos – 0-1 – Vaganian, Rafael A – G58 1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. Nf3 c6 5. g3 e5 6. Bg2 Be7 7. O-O O-O 8. Qc2 Re8 9. b3 Bf8 10. Bb2 a6
Mar del Plata 1982 – Round 1 – Timman, Jan H – 0-1 – Larsen, Bent – G26 1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3 Nbd7 5. g3 c6 6. Bg2 Be7 7. O-O O-O 8. Qc2 Rb8 9. Rd1 Qc7 10. b3 Re8
Montpellier 1985 – Round 1 – Timman, Jan H – 1/2-1/2 – Tal, Mikhail – G2 1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. Nf3 c6 5. g3 e5 6. Bg2 Be7 7. O-O O-O 8. Qc2 Re8 9. b3 Bf8 10. e4 a6
Norway Supreme Masters Blitz 2013 – Round 4.1 – Wang, Hao(ZJWZ) – 1-0 – Topalov, Veselin – G16 1. Nf3 c6 2. g3 d6 3. d4 Nd7 4. c4 e5 5. Nc3 Ngf6 6. Qc2 Be7 7. Bg2 O-O 8. O-O Re8 9. Rd1 Qc7 10. h3 a6
Rotterdam tt 1988 – Round 6.4 – Speelman, Jon S – 1/2-1/2 – Lobron, Eric – G23 1. d4 Nf6 2. Nf3 d6 3. c4 Nbd7 4. Nc3 c6 5. g3 e5 6. Bg2 Be7 7. O-O O-O 8. Qc2 Re8 9. h3 Bf8 10. e4 a6
Torino 1982 – Round 1 – Portisch, Lajos – 1-0 – Kavalek, Lubomir – G1 1. c4 e5 2. Nc3 Nf6 3. g3 d6 4. Bg2 Nbd7 5. Nf3 Be7 6. O-O 6. ... O-O 7. d4 c6 8. Qc2 Qc7 9. b3 Re8 10. Bb2 a6

A54a — Old Indian, Main Line (1933)

1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3 Nbd7 5.g3 Be7 6.Bg2 O-O 7.O-O c6 8.Qc2

Les coups candidats

8…Re8 — 52.6% (680 parties)

Ambassadeurs : Vukic, Milan (11x), Manouck, Thierry (7x), Bezgodova, Svetlana (7x), Goric, Esad (5x), Spraggett, Kevin (4x), Pigusov, Evgeny (4x), Hickl, Joerg (4x), Portisch, Lajos (3x)

8…Qc7 — 34.2% (443 parties)

Ambassadeurs : Stricova, Zuzana (4x), Korchnoi, Viktor (2x), Ivanovic, Bozidar (2x), Hilbenz, Guntram, Dr. (2x), Bruzzi, Stefano (1x), Palda, Karl (1x), Colon Romero, Arturo (1x), Bakali, Mustafa Ahmed (1x)

8…a6 — 7.8% (101 parties)

Ambassadeurs : Terzic, Safet (2x), Vukic, Milan (2x), Mertens, Heiko (2x), Gromek, Jozef (1x), Doda, Zbigniew (1x), Buturin, Vladimir (1x), Legky, Nikolay A (1x), Rajkovic, Dusan (1x)

8…exd4 — 1.7% (22 parties)

Ambassadeurs : Pedersen, Eigil (2x), Horberg, Bengt-Eric (1x), Bauza, Lorenzo (1x), Kupferstich, Moises (1x), Kolvig, Bent (1x), Sande, Oystein (1x), Larsen, Niels Georg (1x), Budt, Karl-Heinz (1x)

Analyse statistique des coups candidats

Répartition par niveau Elo (% des parties)

Tranche Elo	N parties	8…Re8	8…Qc7	8…a6	8…exd4
<1800	31	45%	48%	3%	—
1800-2200	364	44%	40%	9%	2%
2200-2600	794	58%	31%	7%	1%
2600+	15	60%	27%	13%	—

Évolution par décennie (% des parties)

Décennie	N parties	8…Re8	8…Qc7	8…a6	8…exd4
1950s	16	56%	19%	6%	12%
1960s	25	52%	40%	—	4%
1970s	25	56%	20%	—	8%
1980s	137	62%	28%	8%	—
1990s	256	55%	30%	9%	1%
2000s	316	49%	38%	8%	2%
2010s	432	50%	37%	8%	2%
2020s	87	55%	34%	7%	2%

Tendances récentes (2010s → 2020s)

Coup	2010s	2020s	Δ
8…Re8	50%	55%	▲ +5.2%
8…Qc7	37%	34%	▼ -2.1%
8…a6	8%	7%	▼ -1.2%
8…exd4	2%	2%	▲ +0.7%

Joueurs célèbres

Champions du monde dans cette position

Tal, Mikhail — 3 parties
Ju, Wenjun — 1 partie

Parties historiques

8…Re8 — 52.6% (680 parties)

1950 — Zirngibl, Albert vs Grosser, Wilhelm — 1/2-1/2 — Soemmerda GER
1953 — Panno, Oscar vs Pilnik, Herman — 1/2-1/2 — Buenos Aires ARG
1953 — Udovcic, Mijo vs Castaldi, Vincenzo — 0-1 — Venice Venice ITA
1953 — Stoltz, Gösta vs Szabo, Ladislav — 1/2-1/2 — Bucharest ROU
1954 — Nedeljkovic, Srecko M vs Pirc, Vasja — 1/2-1/2 — Belgrade SRB

8…Qc7 — 34.2% (443 parties)

1954 — Porrecca, Giorgio vs Lorson, Gerhard — 1-0 — Amsterdam NED
1956 — Eken, Max vs Nestler, Vincenzo — 1-0 — Lenzerheide Tch
1956 — Bannik, Anatolij vs Pogrebissky, Iosif — 1/2-1/2 — Kiev UKR
1960 — Bruzzi, Stefano vs Palda, Karl — 1-0 — Biel SUI
1963 — Conan, Claude vs Roethel, Michel — 1-0 — Paris FRA

8…a6 — 7.8% (101 parties)

1957 — Gromek, Jozef vs Doda, Zbigniew — 1-0 — Szczawno Zdroj
1980 — Torres Espallardo, Pablo vs Anelli, Antonio — 1-0 — ?
1982 — Kestler, Hans-Guenther vs Fehrig, Andreas — 1-0 — Duitsland tt
1982 — Danielsen, Henrik vs Kjarulff, Ole — 1/2-1/2 — DEN-chJ int Soro
1982 — Nerlov, Claus vs Petersen, Flemming Petri — 1-0 — ?

8…exd4 — 1.7% (22 parties)

1954 — Horberg, Bengt-Eric vs Bauza, Lorenzo — 1-0 — Montevideo URU
1957 — Pedersen, Eigil vs Kupferstich, Moises — 1-0 — Odense DEN
1964 — Kolvig, Bent vs Pedersen, Eigil — 0-1 — DEN-ch Holstebro
1974 — Sande, Oystein vs Larsen, Niels Georg — 1-0 — ?
1976 — Budt, Karl-Heinz vs Mohrenstecher, Juergen — 1-0 — Detmold

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